Converted melting pot structure



Jan. 22, 14935. L. G. OLANDER A 1,988,630

CONVERTED MELTING POT STRUCTURE Filed Aprila, 1954 2 sheets-sheet 1 Indenof n Zaan/1R17 fr La/YUEI? .y QKW Jan. 22, 1935. 4 L G, QLANDER 1,988,630

CONVERTED MELTING POT STRUCTURE Patented Jan. 22, 1935 coNvER'rED MELTING 'Porv STRUCTURE v Leonard G. Olander, Minneapolis, Minn., ,assignerVv to The Monomelt Company Incorporated, Min- ,Y y neapolis, Minn., a, lcorporation of Minnesota Applicationnpril F1,1934, serial No. v719,499

` A1o claims. (c1. 22-71) This invention relates' to a melting pot struc' ture for a type setting machine. Type setting machines arenow in common use and the same comprise a melting pot containing the molten 5 type metal which is forcedagainst the matrix to make the type slugs. 'A great many of such machines have been equipped with an auxiliary melting pot'structure in which is placed' used slugs i and other pieces fof type metal. These lare meltedfin the auxiliary melting poty and the molten type metal is fed to another melting pot from which it is forced against the matrix.

It is also 'common to heat the'melting pots both by means of a gas burner and by electrical heating means, some machines usingA one type of 'heating Sand other machines'using the other. Itis desirable andnecessary in some instances to convert the standard electrically heated melting pot of the type settingmachinelto the type' using a gas burner inplace o ithe electrical heating means. This necessitates providing a coverfor the melting pot Vcasing having means for carrying awaythe gases of combustion from the gas burner, and forming a passage to said means fromsaid burner.V Other changes are also'necessary all of which form part of the present invention. w

vIt is an object of this invention to provide a l simple, novelandeicient melting pot structure having a gas lheating means, the same being converted from a melting pot structure oi-a standard type setting machine using an electrical heatingv means. v

Itis another object of the invention to provide a novel method of converting-the electrically heated melting potl structure of a standard type setting lmachineA to a gasheatedV melting pot structure having a suitable cover fior the melting pot casing. p

V`These 'and other objects and advantages of the invention will be fullyl set forth in the iollowing description made iny connectionwith the accompanying drawings, in which like reference characters refer to similar parts throughout the several views and in which:-

Fig. 1 is a 4View in side elevation of the melting pot structure of the converted machine;

Fig. 2 is "a horizontal section taken on line 2-2 vof Fig. 1 as indicated by the arrows;

Figs. 3 and 4 are respectively! prospective views of certain converting members used;v

Fig."5 is a View taken substantially on line 5-#5 of Fig. 1 as indicated by the arrows;V

Fig. 6 is a horizontal section taken lon line 6-'6 of Fig. 5; and

Fig. 7 is a partial View in side elevation of the original electrically heated machine.. i

. Referring to the drawings, a melting pot casing 10 is shown having its top of' substantially rectangular form in plan, the samehavingsuban' inclined throat portionbetween upper and lower vertical portions. Casing 10 has extending downwardlyand cutwardlyffrom each side thereof, supporting leg members 19d.' Each member 10d 'is bifurcated at lits #lower endto `embrace a suitable support on the type setting machine and is providedwith holding set screws 11. Casing 1f) is also shown-'as having lugsflOc at one end for suitable connection tothe type setting machine butlwhich neednot beiurther described. Casing 10y also has secured thereto an extension 10m having a` dove'tailed projection 1011. Vengaged by` a suitable mouthpiece 13 through which the metal passes. Casing 10 has therein a crucible 14 orfmelting pot y proper.

l'Crucible-14 has -substantially vertical walls spaced from the walls oi-casing10 and substantially parallel thereto,` said vwalls extending some distance ab'ove the-wallsl 10a and y10bv of casing. 10 so that the top ofthe crucible,which -is in substantially Aone horizontal plane, is; some "distance above' ythe plane' of the top cfcasing'lll.

' 10 is 'provided with a closing plate `10;c at vits hmmm. ,Y l

In yone -standard form of type setting' machine of the electrically heated type, vther casing -10 Visprovided with 'a cover 107' secured by bolts l1.0i extending into tapped holes 10h'as "shown in Fig. 2'? and an electrical heating element (not shown) is provided for crucible 14 extending about said crucible in the space between the walls of said crucible andca'sing 10. It will be noted that cover 107' does not have avent stack.

Y Such a machine is not adapted'to'be' heatedby gas. Y I Y f I In changing the machine, cover 10j` is removedv andthe casing 10 Ais then built up to the height of 'crucible-Maud for this purpose mem- `bers 15V and 16 are provided constructedand arranged to'extend about the sides 10a and 10b lci casing 10 and along the throat portion 16e i thereof, said members being provided ywith holes 15a and 16a, respectively, to receive fastening means and said membershave their top suracesconstructed and arranged 'to receive and supporta cover 17 comprising a vent means and which may include an auxiliary meltingpot structure."l An opening'lg is'madein;A the vbottom of'fcasing 10 beneath'crucible 14. A pair 'of brackets 18 are provided and bolted to the'r sides of casing 10 .by bolts 19, The brackets 13 are apertured atjtheir lower ends to receive and have extending therebetween a rod 204, 'the same being held in place by any suitablemeans, such Y as thesplitkeys 21 at theoutersides of brackets Vstantially vertical sidewalls'lOa, a vertical end -wall 10b and another end portion' 10c having have' the; end, of. burner 12 supported therein y 18. A gas burner 22 is provided having a groove i thei latterV Y having afhinged; lid ,170. alsohas-an-exhaust stack` or chimney. 17d which isaanecessary element for a gas heatedmachine. Member: 17 has a flange f 17e; extending partially in its bottom surface fitting over rod 20 so as to be supportedthereby, said 1`burner. 22. being disposed. below ,opening *10g and beneath Crucible 14. Burner 22 hasa main burner lportion 22a,

for heating the bottom of crucible 14 andhas` a pair of tubes 22h extending upwardly therefrom and also forming a burner` adaptedptol heat the throat portion 10e of( Crucible 14. .Burner 22 is supplied with gas by al pipe 23` having. branches 24 and 25 controlled...respectively. by.4

the valves 26 and 27 and having thereon the usual air-regulating members-28. Pipe 24: supi plies gas to the burner 22D and pipe,g25 supplies gas to main burner portion 22a. vA burner 12 visialsofprovidedgfor heating; the :mouthpiece 13, `which burner: extends; horizontally beneath. said mouthpiece'and jisgsupported. by apair of brackets =12a bolted to l`each side.. of casing 10 and proj ecting.l therefrom;v One :bracket is aperturedvv to and the othert bracketfis apertured to receive va supplyapipe; 12b which is connected to the ttingi 23apto: which the-gas .supplyl pipe, 23 is connected.; Bipel'lZb-is providedfwitha suitable Valvew 12e; and `with the` usual air-regulating valve-12d. Burner l2 is shown -ashavingaseriescf holes 12e .therein throughowhich fthe gas passes tdbeignited.

The fspacebetween crucible `14: 1 and casing-.10 is preferablyf, providedwith material 29 forming a; Ypoor .conductor of heat. rr passage 10o is formed about Crucible; 14, which-4 leads from; the

opening; in zitsbottomadjacent-,burner 22 tov they coverf-l'? and-.vent stack 17d;` for carryingoff e theJ products; or. gases .of combustion from; said burner. I

,The casing 17gcomprisesaimetal receivingfand melting portion 17a` and; a hopper portionY 17h, Casing; 17

thereabout particularly at the corners andzsaid ange A. has'y four/holes; provided therein adapted to alinef'with, holes 15a and 160i, in members 15 and -16, respectively, and with the tappedcholes lhf'infcasingll);l Boltsor screwsc 3.04 extend through the holesin flangevl'eand through the holesf--15arand 16a.;E thus'vfasteningy bars. 15 and t 16 andrmemberi 17 securelyto'casingl 10 softhat f and.v 22h will; pass through the. passage 10ol to stack1'7ds lTheinsulating material29 between `the .fwalls-10a. and-10b and the Crucible 1 4 insures that the-'cruciblepwill be well insulated.4 The typemetalisnowplacedin thehopper 1'7b and `Amelted infthe auxiliary meltingpot incasing 157.

lIt; is@ fed'` from;v casing 17. intot the lower melting potforv CrucibleA 14 f'which now ,becomesr the` second melting pot;l There are a great many advantages in; having the `auxiliary meltingpot structure. All i of the dross is kept in the i auxiliary meltingpot as the metal. is ,fed' tor-the` lower ,-pottfrom the bottom. A- constant-supplyof said casing.

metal can be maintained in the lower pot by automatic means and a preliminary smelting or remelting of the, used, type. metal and` Waste metal is not necessary. While varioustyDes of covers having means for carrying off the gases ofv` combustion might be used, in the embodiment of the invention illustrated, a cover having an Aauxiliary `melting pot has preferably been shown. v y

Eromthe abovevdescription it is seen that applicant. hasinvented a simple and ingenious method of constructing a gas heated melting pot structurelwhich results in a novel and useful product. lThe invention has been amply demonstrated in actual practice and has been found togbezvery successful and eicient.

It: \vill, of course, Vbe understood.-'that various changes maybe: madefin the-form, details,l arrangement an'dproportionsof the device and ingtlie steps;and;sequence of stepsfofl the-meth-l` odfofmakingthe same without departing-from the scope of: applicants invention, which, generally stated,- consists =in a Aprocess t and product Vcapableaofcarryingi outfthe objectsA above :set

forth, suchrasldisclosedand defined in thefap- 1 y pended claims. l

, What is claimed isz-.- t

1. A1 meltingpot, structure for a type; setting machine having in combination, a meltingpot lcasingga .melting pot, crucible thereinf'having f `Walls spacedffrom the-Walls :of said casing. and

extending abovethea-top yof said; casing,".means shaped tofit. the.- 4 topg. of 1 said casingland formed at--its top-z to `receive acover comprisingqa vent vmeans.Y and-.having its. top.- substantially flush .horizontally with,- the v topi: of said. Crucible; said casing having, ani OpeningJthereinaunder said Crucible ,z a gasburner carried bysaid i casing and disposed-thereunder in Avertical alinement with said: openingtand cruciblef-'a :cover disposedon said: means comprising-a ventwmeansfor carrying away products of combustiom. said` casing having a passage-leading, fromV said. burner to said :vent means and fastening means extending through` saidr-cover .and-said first mentioned.

means-and into saidi-casings forA securing. said Ycover in lplacez K Y 2. A melting pot structure fon a type ,setting machinethavingf in f combination, ai melting-pot casing, ya melting pot a Crucible therein having;

walls spaced fromthe wal1s-ofrsaid casing and extending -f above the top,off.,said casing,y bars shaped toiit the topof4 said casing and-:having top surfaces substantially flush :horizontally-With' the top" of saidfcrucible. and constructed and4 ar- `ranged to receive:andrsupporta,coveri said casing, having e an lopening. in vits :bottom: under; said ,crucib1e, brackets-secured tosaid casing,- a gas burner carried by said brackets-and disposedin vertical Yalinementwith said opening; and crucib1e,. acover `having aventfzstack thereonvsupported: OnsaidbarS, said casingghavingfa passageileadingfrom:saidrburnerv` to said stack and fasteningmeans securingsaid-cover, and-bars to 3. A melting.; pot structure; for atype;l setting machine lhav-ing.A in; combination', a meltingpot casing,J `a meltingpot crucible thereinqhaving walls,.sp acedfromlthe walls offsaidcasing and extending above the top offsaidr casing,-a .pair

-ofbars-shaped to be-fdisposed upon: and 4extend around the edge ofsaidL casing, saidy barshav- Y.ing their-topsurfaces substantially flushthorizontally withzthe'top of said crucibleandzadapted. to4 receive aA cover; said: casing.: havinge an opening beneath said crucible, brackets secured to the sides of said casing, a member extending between said brackets, a gas burner supported on said member vertically alined with said opening and crucible, a quantity of material forming a poor conductor of heat disposed between said casing and Crucible, a cover comprising a Vent stack and an auxiliary melting pot disposed on said bars and fastening means securing said cover and bars to said casing.

4. The method of converting an electrically heated melting pot structure for a type setting machine comprising a melting pot casing having a crucible therein spacedfrom the walls thereof and extending above the top thereof and having electrical heating means for said crucible, which consists in removing said electrical heating means, building up the top of said casing to be flush horizontally with the top of said crucible with means adapted to receive and support a cover comprising a vent means, securing a cover having a vent means for the products of combustion to said last mentioned means, supporting a gas burner from said casing beneath the same and said crucible in position to heat said crucible and providing a passage in said casing to said vent means whereby a. gas heated device is provided.

5. The method of converting an electrically heated melting pot structure for a type setting machine comprising a melting pot casing having a closed bottom and having a crucible therein extending above the top of said casing and having electrical heating means for said crucible, into a gas heated structure which consists in removing said electrical heating means, placing means on top of said casing adapted to receive a cover having a vent stack thereon, forming an opening in the bottom of said casing below said crucible, securing brackets to the sides of said casing, supporting a gas burner on said brackets below said opening and crucible, placing a cover comprising a vent stack on said means, providing a passage between said burner and vent stack and securing said cover and said means to said casing.

6. The methodof converting an electrically heated melting pot structure for a type setting machine comprising a melting pot casing having a closed bottom and having a crucible extending above the top of said casing and having electrical heating means for said crucible, into a gas heated structure which consists in removing said electrical heating means, placing a pairof bars on top of said casing having top surfaces substantially flush horizontally with the top of said crucible and adapted to receive acover comprising a vent means, forming an opening yin kthe bottom of said casing below said crucible, securing brackets to the sides of said casing, providing means extending between said brackets, supporting a gas burner on said means below said opening and crucible, placing a cover comprising a vent stack on said bars, providing a passage from saidiburner to said stack through said casing and securing said cover and said bars to said casing. L

'7. The method of converting'an electrically heated melting pot structure for a type setting machine comprising a melting pot casing having a crucible therein extending above thetop thereof having an electrical heating means for said crucible and a closed cover, into a gas heated machine which consists in removing said cover and electrical heating means, building up the top of said casing to-be ilush horizontally with the top of said crucible with means adap-tedto receive and support a cover having a vent means thereon, .securing a cover having a vent means Athereon through which the products of combus-` tion may escape to said last mentioned means, supporting a gas burner from said casing beneath the same and said crucible in position to heat said crucible'and providing a passage through said casing tosaid vent means to carry olf the products of combustion from said gas burner whereby a gas heated device is provided.

8. The method of converting an electrically heated melting pot structure for a 'type setting machine comprising a melting pot casing having a crucible therein extending above the top thereof, having an electrical heating meansfor said crucible and a closed cover,` into a gas heated machine which consists in removing said cover and electrical heating means, building up the top of said casing, placing a cover on said casing and crucible having a vent means thereon for carrying 01T the products of combustion, supporting a gas burner beneath said crucible in position to heat the same and providing a pas-` sage for the products of combustion from said gas burner to said vent means.

9. The method of converting an electrically heated melting pot for a type setting machine comprising a meltingpot casing having a throat beneath said crucible in position to heat the f same, supportingV a gas burner beneath said throat portion, another gas `burner beneath said mouthpiece and providing a passage for the gases of combustion from said rst mentioned burner through said casing to said vent means.

'10. The methodof converting an electrically heated melting pot structure for a type Setting machine comprising a melting pot casing having a mouthpiece thereon,` a crucible in said casing extending above the top thereof, an electrical heatingmeans for said crucible, and a closed cover for said casing, into a gas heated machine which consists in removing said cover and electrical heating means, building up the top of said casing, placing a cover on said casing over said crucible having a vent means thereon for carrying off the gases of combustion, supporting a 'gas burner beneath said crucible in position to heat the same, securing brackets to the sides of said casing adjacent said mouthpiece, supporting a gas burner on said brackets beneath said mouthpiece and providing a passage for the gases of combustion from said first mentioned gas burner to said vent means.

LEONARD G. OLANDER.v 

